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More Info: Giving Invasive Plants the Boot 

OutdoorIllinois story May 2011

Giving Invasive Plants the Boot

Boot brushes installed at trail heads reveal a surprising source of exotic plant seeds: Us.

In 2010, Misty McElyea, a plant biology research student at Southern Illinois University-Carbondale, collected dirt samples from boots that were brushed off at dozens of trail heads in southern Illinois then germinated the seeds she found. Here is a list of 21 of the most common invasive plant species and the number of boot brush stations where these species were documented.

Observed species found around boot brush stations:

1)   Albizia julibrissin Durazz. (Mimosa) - 0

2)   Alliaria petiolata (M. Bieb.) Cavara & Grande (Garlic mustard) - 1

3)   Celastrus orbiculatus Thunb. (Oriental bittersweet) - 3

4)   Daucus carota L. (Queen Anne’s lace) - 2

5)   Dipsacus laciniatus L. (Cutleaf teasel) - 0

6)   Dipsacus fullonum L. (Common teasel) - 0

7)   Elaegnus umbellate Thunb. (Autumn olive) - 1

8)   Humulus japonicus Siebold & Zucc. (Japanese hop) - 0

9)   Lespedeza sericea Miq.  (Sericea lespedeza ) - 0

10)   Lespedeza bicolor Turcz. (Shrubby lespedeza) - 1

11)   Lonicera japonica Thunb. (Japanese honeysuckle) 6

12)   Lonicera maackii (Rupr.) Herder (Amur honeysuckle) - 0

13)   Melilotus officinalis (L.) Lam. (Sweet clover) - 1

14)   Microstegium vimineum (Trin.) A. Camus (Japanese stiltgrass ) - 4

15)   Perilla frutescens (L.) Britton  (Beefsteak plant) - 0

16)   Polygonum persicaria L. (Oriental ladysthumb) - 2

17)   Rosa multiflora Thunb. (Multiflora rose) - 6

18)   Securigera varia (L.) Lassen (Crownvetch) - 0

19)   Trifolium pretense L. (Red clover) - 1

20)   Trifolium repens L. (White clover) - 10

21)   Verbascum thapsus L. (Common mullein) – 0

Observed species found along the trail:

1)   Albizia julibrissin Durazz. (Mimosa) - 1

2)   Alliaria petiolata (M. Bieb.) Cavara & Grande (Garlic mustard) - 1

3)   Celastrus orbiculatus Thunb. (Oriental bittersweet) – 6

4)   Daucus carota L. (Queen Anne’s lace) - 4

5)   Dipsacus laciniatus L. (Cutleaf teasel) - 0

6)   Dipsacus fullonum L. (Common teasel) - 0

7)   Elaegnus umbellate Thunb. (Autumn olive) - 2

8)   Humulus japonicus Siebold & Zucc. (Japanese hop) - 0

9)   Lespedeza sericea Miq.  (Sericea lespedeza ) - 4

10)   Lespedeza bicolor Turcz. (Shrubby lespedeza) - 0

11)   Lonicera japonica Thunb. (Japanese honeysuckle) - 15

12)   Lonicera maackii (Rupr.) Herder (Amur honeysuckle) - 1

13)   Melilotus officinalis (L.) Lam. (Sweet clover) - 3

14)   Microstegium vimineum (Trin.) A. Camus (Japanese stiltgrass ) - 7

15)   Perilla frutescens (L.) Britton  (Beefsteak plant) - 8

16)   Polygonum persicaria L. (Oriental ladysthumb) - 3

17)   Rosa multiflora Thunb. (Multiflora rose) - 14

18)   Securigera varia (L.) Lassen (Crownvetch) - 0

19)   Trifolium pretense L. (Red clover) - 4

20)   Trifolium repens L. (White clover) - 11

21)   Verbascum thapsus L. (Common mullein) – 1